HC257 - Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs)

Product Overview

Hitachi Semiconductor

Part number	HC257
Manufacturer	Hitachi Semiconductor
File Size	52.59 KB
Description	Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs)
Datasheet	HC257 Datasheet
Additional preview pages of the HC257 datasheet.

The large output drive capability coupled with the 3-state feature make this device ideal for interfacing with bus lines in a bus organized system.

When the output control input line is taken high, the outputs of all four multiplexers are sent into a high impedance state.

High Speed Operation: tpd (Data to Y) = 10.5 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Inputs Output Control L L L L H Select L L H H X A L H X X X B X X L H X Outputs Y L H L H High impedance Notes H: high level, L: low level, X: irrelevant HD74HC257 Pin Arrangement Select.

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Published: Mar 23, 2005 |